Water-heater.



V. MAUGK & K. HOWIE.

WATER HEATER.

APPLICATION FILED FEB.21,1912.

Patented Jan. 26, 1915.

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Jfnneth Jfowzle, g d/Z/m m MW (KW pnrrnp sraains raarnrrr orrrcn VICTOR MAUCK AND KENNETH HOWIE, OF CONSHOHOCKEN, PENNSYLVANIA, ASSIGN- ORS TO JOHN WOOD MANUFACTURING COMPANY, A CORPDRATION @E PENNSYL- VANIA.

WATER-HEATER.

Patented Jan. 26,1915.

Application filed February 21, 1912. Serial No. 679,048.

To all whom it may concern:

Be it known that we, VICTOR MAUCK and KENNETH HOWIE, l; citizens of the United States, residing at Conshohocken, Pennsylvania, have-invented certain new and useful Improvements in Water-Heaters, of which the following is a specification.

Our invention relates to water heating apparatus, and particularly to apparatus intended to be heated froma gas burner, the heating element being connected with a storage drum or reservoir.

Our present improvement concerns particularly a valve arranged for controlling the gas supply, and it consists in the features and combination and arrangement of parts hereinafter described and particularly set forth in the appended claims.

The invention is shown in the accompanying drawings, in Which Figure 1 is a view of the main and pilot burners and the gas valve mechanism, parts being shown in section and parts in elevation. Fig. 2 is a view of the complete apparatus, some of the parts being shown in section and others in elevation.

In these drawings, A indicates generally a burner the flame from which is adapted to act upon the heating element A, which is connected with the storage drum or reservoir A The gas is supplied to this burner through the. passage 1 in the valve casing, which casing is threaded at 2 to receive the supply pipe. From the passage 1 the gas passes to a valve 3, and when this is open it reaches the burner through the passage 4. The valve 3 is of disk form, and is associated or combined with a diaphragm 5 held at its edges between the main base portion 6 of the casing which contains the passages 1 and 4, and a superimposed casing .7 which has a flange or portion at 8 between which and a suitable rim or surface on the main by a thermostatic element 12 which extends into the heater of the reservoir or storagechamber to be acted upon by the temperature of the water therein. 3 is provided with a leakage orifice 13 extending therethrough so that a small portion of the gas may pass from the under side of the diaphragm to the chamber 14, on the upper side thereof, and the supplemental valve 9 above described controls the escape of this leakage, the escape passage being indlcated at 15 connecting with a suitable dis- The main valve charge pipe 16 which preferably extends to a pilot burner B which is suitably associated with the main burner A to light the same when the main gas supply reaches this main burner. The spring 11, at its lower end,

. rests upon a cross piece or cover portion 17 this escapement chamber there is a small outlet 20 of smaller diameter than the leakage orifice 13. From the arrangement described, while the burner is in'operation the main valve is, of course, open and the diaphragm is bearing against the flange 19 to close the escapement chamber within said flange. A small quantity ofthe gas is pass ing through the leakage orifice 13 into this escapement chamber, and thence to the pilot burner past the supplemental valve 9, which is now open. When the temperature of the water in the storage chamber rises to the desired degree, the supplemental valve 9 closes upon its seat, due to the combined control of the thermostatic element and the spring 11, and therefore pressurewill be built up in the chamber 14 on the upper side of the diaphragm, and this diaphragm will be forced downwardly by this built up pressure, together with the valve, so that the valve will close and out OK the gas supply from the main burner. hen, on the other hand, the temperature of the Water in the storage chamber or reservoir falls to a .gpredetermined degree, the valve 9 will be opened and this will relieve the pressure in the chamber 14 on the upper side of the diaphragm 5, so that the pressure of the gas from the main :will at once open the main valve and-allow the gas to pass thesaine and thence, by way of the passage 4, to the main burner, where it will be lighted by the pilot light. This pilot light is supplied through a port 21 connecting with the passage l, passing thence through a nipple 22 into the chamber. 23, from which the pipe 16 extends to the pilot light, the said chamber 23 also receiving the leakage gas through the passage 15.

It will be understood that we do not w limit ourselves to the precise way of operating the valve, and our present invention concerns among other features the relative arrangement oi the main and supplemental valve in the one casing, and coaxially oi:

each other and of the escapement chamber.

' thermostat and pilot.

The thermostat 12 consists of a copper 'tube 24; closed at the upper end, in which is placed a carbon rod 25.

The copper has a large co-eflicient of expansion whereas the carbon has a co-efhcient of near zero. When the copper tube is cooled, I

it contracts, forcing the carbon rod against the valve stem and opening thesupplemental valve against the spring. When the temperature of the copper tube is raised, it expands, allowing the spring to push up-the carbon rod and so closethe valve against its seat. Whenthe burner is out, the leather diaphragm is down against the valve seat, and the supplemental valve is closed. As the water cools oh, the thermostat opens the supplemental valve, allowing the gas that has accumulated in the space above themain valve to pass under the supplemental valve, and out through the passage to the pilot where it is burned. As the hole 13 in the valve (3) is very small, the opening of the supplemental yalve causes the'pressure on the upper side of the diaphragm to fall and the gaspressure forces it up, allowing the gas to flow to the main burner.

At 26 is an adjusting nut.

27 is a set screw to adjust the length of the I pilot frame. 4

The cold water inlet to the storage tank is indicated at 28. The connection from the storage tank to the lower part of the heater is shown at 29, and the connection between the top of the heater and the upper part of the storage tank at 30 while the hot water outlet is at 31.

It will be observed that the thermostat, burner, water heater and storage tank are arranged substantially coaXially in the same structure or within the limits of the tank. The'water heater is, in fact, together with the thermostat inclosed within the walls of the tank, being located in a chamber or recess formed in'the tank. From this recess a flue 32 extends upwardly through the tank. By this arrangement not only is the structure'renderecl compact, requiring less room than the other heating systems, but the heat of the burner is conserved, the flame acting upon not only the water heater coil but its heat being absorbed by the storage tank and any heat radiating from the water heater also acts on the storage tank.

The pilot light gives a blue flame, an air supply opening being shown at 23*. This blue flame acts upon the water-heater.

It will be noticed that the pilot burner has a hood, and the function-of this is to prevent sediment of any kind from lodging in the pipe of the pilot burner and alsoto serve as a protection to the blue flame which issues from the pilot burner directly adjacent the main burner. This hood will prevent the blue flame from being blown out. Should the blue flame blow out the gas will escape unlighted from the main burner when the main valve opens, but with the protecting hood the blowing out of the pilot burner will not occur. The air inlet for the blue flame is provided by an opening 23*, one of these openings being formed on each side of the wall of the chamber 23, only one of said openings being illustrated in dotted lines in Fig. 1. These openings are arranged below the end of the nipple 22, so that the gas issuing from the nipple creates an injector action to draw in the air. An advantage arisesfrom this arrangement over one in whlch the gas inlet is below the airopening, for the reason that the incoming air will not blow the gas aside and dissipate it into the atmosphere.

WVe claim as our invention 1. In combination in apparatus of the class described, a main burner, a valve casmg, a diaphragm mam valve therein, having a leakage orifice therethrough, a supplemental valve within the casing arranged coing an orifice for the passage of the gas of smaller diameter than the orifice of the main valve, substantially as described.

In combination a burner a main valve, a casing, a diaphragm carrying the said main valve, the said valve casing having an inlet for the gas to act on one side of the diaphragm and means of communication between said inlet and the other side of the diaphragm to build up a closing pressure, a supplemental valve controlling the closing pressure and arranged in a closing pressure chamber on the side of the main valve, 0pposite the main inlet, said supplemental valve being co-axially arranged in respect to the main valve, a stem for the supplemental valve, a cross piece in which the stem of the supplemental valve is guided saidcross piece forming a part of the valve casing, a spring above sald cross piece a collar on the valve stem on whlch the spring bears to seat the valve by upward pressure,

and a co-axially arranged thermostat acting VICTOR MAUCK. KENNETH HOVVIE.

' Witnesses:

JOHN R. HENDRICKS, MADELINE R. DALY. 

